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Linux/arch/sh/boards/mach-r2d/irq.c

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  1 /*
  2  * linux/arch/sh/boards/renesas/rts7751r2d/irq.c
  3  *
  4  * Copyright (C) 2007  Magnus Damm
  5  * Copyright (C) 2000  Kazumoto Kojima
  6  *
  7  * Renesas Technology Sales RTS7751R2D Support, R2D-PLUS and R2D-1.
  8  *
  9  * Modified for RTS7751R2D by
 10  * Atom Create Engineering Co., Ltd. 2002.
 11  */
 12 #include <linux/init.h>
 13 #include <linux/irq.h>
 14 #include <linux/interrupt.h>
 15 #include <linux/io.h>
 16 #include <mach/r2d.h>
 17 
 18 #define R2D_NR_IRL 13
 19 
 20 enum {
 21         UNUSED = 0,
 22 
 23         /* board specific interrupt sources (R2D-1 and R2D-PLUS) */
 24         EXT,              /* EXT_INT0-3 */
 25         RTC_T, RTC_A,     /* Real Time Clock */
 26         AX88796,          /* Ethernet controller (R2D-1 board) */
 27         KEY,              /* Key input (R2D-PLUS board) */
 28         SDCARD,           /* SD Card */
 29         CF_CD, CF_IDE,    /* CF Card Detect + CF IDE */
 30         SM501,            /* SM501 aka Voyager */
 31         PCI_INTD_RTL8139, /* Ethernet controller */
 32         PCI_INTC_PCI1520, /* Cardbus/PCMCIA bridge */
 33         PCI_INTB_RTL8139, /* Ethernet controller with HUB (R2D-PLUS board) */
 34         PCI_INTB_SLOT,    /* PCI Slot 3.3v (R2D-1 board) */
 35         PCI_INTA_SLOT,    /* PCI Slot 3.3v */
 36         TP,               /* Touch Panel */
 37 };
 38 
 39 #ifdef CONFIG_RTS7751R2D_1
 40 
 41 /* Vectors for R2D-1 */
 42 static struct intc_vect vectors_r2d_1[] __initdata = {
 43         INTC_IRQ(EXT, IRQ_EXT),
 44         INTC_IRQ(RTC_T, IRQ_RTC_T), INTC_IRQ(RTC_A, IRQ_RTC_A),
 45         INTC_IRQ(AX88796, IRQ_AX88796), INTC_IRQ(SDCARD, IRQ_SDCARD),
 46         INTC_IRQ(CF_CD, IRQ_CF_CD), INTC_IRQ(CF_IDE, IRQ_CF_IDE), /* ng */
 47         INTC_IRQ(SM501, IRQ_VOYAGER),
 48         INTC_IRQ(PCI_INTD_RTL8139, IRQ_PCI_INTD),
 49         INTC_IRQ(PCI_INTC_PCI1520, IRQ_PCI_INTC),
 50         INTC_IRQ(PCI_INTB_SLOT, IRQ_PCI_INTB),
 51         INTC_IRQ(PCI_INTA_SLOT, IRQ_PCI_INTA),
 52         INTC_IRQ(TP, IRQ_TP),
 53 };
 54 
 55 /* IRLMSK mask register layout for R2D-1 */
 56 static struct intc_mask_reg mask_registers_r2d_1[] __initdata = {
 57         { 0xa4000000, 0, 16, /* IRLMSK */
 58           { TP, PCI_INTA_SLOT, PCI_INTB_SLOT,
 59             PCI_INTC_PCI1520, PCI_INTD_RTL8139,
 60             SM501, CF_IDE, CF_CD, SDCARD, AX88796,
 61             RTC_A, RTC_T, 0, 0, 0, EXT } },
 62 };
 63 
 64 /* IRLn to IRQ table for R2D-1 */
 65 static unsigned char irl2irq_r2d_1[R2D_NR_IRL] __initdata = {
 66         IRQ_PCI_INTD, IRQ_CF_IDE, IRQ_CF_CD, IRQ_PCI_INTC,
 67         IRQ_VOYAGER, IRQ_AX88796, IRQ_RTC_A, IRQ_RTC_T,
 68         IRQ_SDCARD, IRQ_PCI_INTA, IRQ_PCI_INTB, IRQ_EXT,
 69         IRQ_TP,
 70 };
 71 
 72 static DECLARE_INTC_DESC(intc_desc_r2d_1, "r2d-1", vectors_r2d_1,
 73                          NULL, mask_registers_r2d_1, NULL, NULL);
 74 
 75 #endif /* CONFIG_RTS7751R2D_1 */
 76 
 77 #ifdef CONFIG_RTS7751R2D_PLUS
 78 
 79 /* Vectors for R2D-PLUS */
 80 static struct intc_vect vectors_r2d_plus[] __initdata = {
 81         INTC_IRQ(EXT, IRQ_EXT),
 82         INTC_IRQ(RTC_T, IRQ_RTC_T), INTC_IRQ(RTC_A, IRQ_RTC_A),
 83         INTC_IRQ(KEY, IRQ_KEY), INTC_IRQ(SDCARD, IRQ_SDCARD),
 84         INTC_IRQ(CF_CD, IRQ_CF_CD), INTC_IRQ(CF_IDE, IRQ_CF_IDE),
 85         INTC_IRQ(SM501, IRQ_VOYAGER),
 86         INTC_IRQ(PCI_INTD_RTL8139, IRQ_PCI_INTD),
 87         INTC_IRQ(PCI_INTC_PCI1520, IRQ_PCI_INTC),
 88         INTC_IRQ(PCI_INTB_RTL8139, IRQ_PCI_INTB),
 89         INTC_IRQ(PCI_INTA_SLOT, IRQ_PCI_INTA),
 90         INTC_IRQ(TP, IRQ_TP),
 91 };
 92 
 93 /* IRLMSK mask register layout for R2D-PLUS */
 94 static struct intc_mask_reg mask_registers_r2d_plus[] __initdata = {
 95         { 0xa4000000, 0, 16, /* IRLMSK */
 96           { TP, PCI_INTA_SLOT, PCI_INTB_RTL8139,
 97             PCI_INTC_PCI1520, PCI_INTD_RTL8139,
 98             SM501, CF_IDE, CF_CD, SDCARD, KEY,
 99             RTC_A, RTC_T, 0, 0, 0, EXT } },
100 };
101 
102 /* IRLn to IRQ table for R2D-PLUS */
103 static unsigned char irl2irq_r2d_plus[R2D_NR_IRL] __initdata = {
104         IRQ_PCI_INTD, IRQ_CF_IDE, IRQ_CF_CD, IRQ_PCI_INTC,
105         IRQ_VOYAGER, IRQ_KEY, IRQ_RTC_A, IRQ_RTC_T,
106         IRQ_SDCARD, IRQ_PCI_INTA, IRQ_PCI_INTB, IRQ_EXT,
107         IRQ_TP,
108 };
109 
110 static DECLARE_INTC_DESC(intc_desc_r2d_plus, "r2d-plus", vectors_r2d_plus,
111                          NULL, mask_registers_r2d_plus, NULL, NULL);
112 
113 #endif /* CONFIG_RTS7751R2D_PLUS */
114 
115 static unsigned char irl2irq[R2D_NR_IRL];
116 
117 int rts7751r2d_irq_demux(int irq)
118 {
119         if (irq >= R2D_NR_IRL || irq < 0 || !irl2irq[irq])
120                 return irq;
121 
122         return irl2irq[irq];
123 }
124 
125 /*
126  * Initialize IRQ setting
127  */
128 void __init init_rts7751r2d_IRQ(void)
129 {
130         struct intc_desc *d;
131 
132         switch (__raw_readw(PA_VERREG) & 0xf0) {
133 #ifdef CONFIG_RTS7751R2D_PLUS
134         case 0x10:
135                 printk(KERN_INFO "Using R2D-PLUS interrupt controller.\n");
136                 d = &intc_desc_r2d_plus;
137                 memcpy(irl2irq, irl2irq_r2d_plus, R2D_NR_IRL);
138                 break;
139 #endif
140 #ifdef CONFIG_RTS7751R2D_1
141         case 0x00: /* according to manual */
142         case 0x30: /* in reality */
143                 printk(KERN_INFO "Using R2D-1 interrupt controller.\n");
144                 d = &intc_desc_r2d_1;
145                 memcpy(irl2irq, irl2irq_r2d_1, R2D_NR_IRL);
146                 break;
147 #endif
148         default:
149                 printk(KERN_INFO "Unknown R2D interrupt controller 0x%04x\n",
150                        __raw_readw(PA_VERREG));
151                 return;
152         }
153 
154         register_intc_controller(d);
155 }
156 

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